I build a project that just need BCM94343W_AVN to send ethernet packet direct to SPI. And my MCU receive from SPI handle TCP/IP. So what should i modify on WICED-SDK. I am confusing with LwIP , NetX, or this function to get the raw packet have already had in WICED-API. Please help me

I'm not sure if I understand you correctly. Could you clarify a bit please? Where are you getting this packet from?

If you are talking about capturing raw wifi frames, you can do that with our monitor mode. This can be enabled by wwd_wifi_enable_monitor_mode(). Take a look at WICED-SDK-3.5.2\WICED\internal\wiced_cooee.c for the usage.